package com.tbzz.mycloud.lb;

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Component
public class MyLb implements LoadBalancer {

    private AtomicInteger atomicInteger = new AtomicInteger(0);
    public final int getAndIncrement(){
        int current;
        int next;
        do{
            current = atomicInteger.get();
            next = current >= 2147483647 ? 0:current+1;
        }while (!this.atomicInteger.compareAndSet(current,next));
        System.out.println("*******访问的次数********："+next);
            return next;
    }
    @Override
    public ServiceInstance instance(List<ServiceInstance> instanceList) {
        int andIncrement = getAndIncrement();
        int index = andIncrement % instanceList.size();
        return instanceList.get(index);
    }
}
